| /* |
| * libhfs - library for reading and writing Macintosh HFS volumes |
| * |
| * The iterator shown here iterates over the blocks of a fork. |
| * |
| * Copyright (C) 2000 Klaus Halfmann <khalfmann@libra.de> |
| * Original work by 1996-1998 Robert Leslie <rob@mars.org> |
| * other work 2000 from Brad Boyer (flar@pants.nu) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| * MA 02110-1301, USA. |
| * |
| * $Id: blockiter.h,v 1.1 2000/10/10 11:14:05 hasi Exp $ |
| */ |
| |
| /* Structure of the blockiterator */ |
| typedef struct |
| { |
| volume* vol; // volume we iterate over |
| UInt32 curr_block; // current, absolute block |
| UInt32 block; // relative block in current extent |
| UInt32 max_block; // Maximum allowed block |
| UInt32 fileId; // id of file we iterate over |
| int index; // 0 .. 7 in current extent |
| hfsp_extent* file; // original extent record from file |
| hfsp_extent* e; // current extentent under examination |
| UInt8 forktype; // type of fork we iterate over |
| UInt8 in_extent; // boolean 0 - in file extent |
| // 1 - in extents file |
| extent_record er; // record to iterate in extents file. |
| } blockiter; |
| |
| /* Initialize iterator for a given fork */ |
| extern void blockiter_init(blockiter* b, volume* vol, hfsp_fork_raw* f, |
| UInt8 forktype, UInt32 fileId); |
| |
| /* find next block of the fork iterating over */ |
| extern int blockiter_next(blockiter *b); |
| |
| /* skip the indicated number of blocks */ |
| extern int blockiter_skip(blockiter *b, UInt32 skip); |
| |
| /* return current block */ |
| static inline UInt32 blockiter_curr(blockiter *b) |
| { |
| return b->e->start_block + b->block; |
| } |